Effect of Inclination Angle on the Micro Dimple Machined Using Inclined Milling Method
DOI:
https://doi.org/10.15282/ijame.22.4.2025.9.0986Keywords:
Micro dimple, Inclined milling, Ball end mill, Surface roughness, Milling processAbstract
In micro-dimple fabrication using the inclined milling method, center marks commonly form at the dimple base, resulting in inconsistent dimple depth and a rough surface texture. These defects can lead to uneven lubricant distribution, increased localized friction, and premature surface damage in tribological applications. This study investigates the influence of inclination angle (θ) on milling center mark formation and overall dimple quality during inclined milling. Experimental work was performed using inclination angles ranging from 0° to 45°, and the machined dimples were analyzed using a Laser Confocal Microscope. The results show that at θ = 45°, the milling center mark on the dimple base was eliminated, and the average area surface roughness (Ra) improved by 70% compared to the perpendicular dimple (θ = 0°). These quantitative improvements highlight the significance of tool inclination in minimizing surface defects and enhancing lubrication pathways. The study demonstrates that optimizing the inclination angle not only mitigates center mark formation but also enhances dimple uniformity and surface finish, addressing critical challenges in micro-texture quality and lubrication efficiency for precision engineering applications.
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